Victoria's fourth, and her chap's third bottle (4)
I believe the answer is:
vial
'bottle' is the definition.
(vial is a kind of bottle)
'victoria's fourth and her chap's third' is the wordplay.
I cannot really see how this works, but
'her' could be 'vi' and 'vi' is located in the answer.
'chap' could be 'al' (man's name) and 'al' is found in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
(Other definitions for vial that I've seen before include "Small glass container" , "Ampoule" , "Not much bottle" , "Small container for liquids" , "Bottle that contains a drug" .)